<template>
  <div class="child2">
    <h3>子组件2</h3>
    <h4>电脑：{{ computer }}</h4>
    <h4>哥哥给的玩具：{{ toy }}</h4>
  </div>
</template>

<script setup lang="ts" name="Child2">
  import { ref, onUnmounted } from 'vue'
  import emitter from '@/utils/emitter'
  // 数据
  let computer = ref('联想')
  let toy = ref('')

  // 给emitter绑定send-toy事件
  emitter.on('send-toy', (value: any) => {
    toy.value = value
  })
  // 在组件卸载时解绑send-toy事件
  onUnmounted(() => {
    emitter.off('send-toy')
  })
</script>

<style scoped>
  .child2 {
    margin-top: 50px;
    background-color: orange;
    padding: 10px;
    box-shadow: 0 0 10px black;
    border-radius: 10px;
  }
</style>
